[v2,02/14] hw/block/nvme: add trace event for requests with non-zero status code

Commit Message

Klaus Jensen Sept. 29, 2020, 11:19 p.m. UTC

From: Klaus Jensen <[e-mail]>

If a command results in a non-zero status code, trace it.

Signed-off-by: Klaus Jensen <[e-mail]>
---
 hw/block/nvme.c       | 6 ++++++
 hw/block/trace-events | 1 +
 2 files changed, 7 insertions(+)

Patch

diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index 84b6b516fa7b..3cbc3c7b75b1 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -777,6 +777,12 @@  static void nvme_enqueue_req_completion(NvmeCQueue *cq, NvmeRequest *req)
     assert(cq->cqid == req->sq->cqid);
     trace_pci_nvme_enqueue_req_completion(nvme_cid(req), cq->cqid,
                                           req->status);
+
+    if (req->status) {
+        trace_pci_nvme_err_req_status(nvme_cid(req), nvme_nsid(req->ns),
+                                      req->status, req->cmd.opcode);
+    }
+
     QTAILQ_REMOVE(&req->sq->out_req_list, req, entry);
     QTAILQ_INSERT_TAIL(&cq->req_list, req, entry);
     timer_mod(cq->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + 500);
diff --git a/hw/block/trace-events b/hw/block/trace-events
index 5a239b80bf36..9e7507c5abde 100644
--- a/hw/block/trace-events
+++ b/hw/block/trace-events
@@ -89,6 +89,7 @@  pci_nvme_mmio_shutdown_cleared(void) "shutdown bit cleared"
 
 # nvme traces for error conditions
 pci_nvme_err_mdts(uint16_t cid, size_t len) "cid %"PRIu16" len %zu"
+pci_nvme_err_req_status(uint16_t cid, uint32_t nsid, uint16_t status, uint8_t opc) "cid %"PRIu16" nsid %"PRIu32" status 0x%"PRIx16" opc 0x%"PRIx8""
 pci_nvme_err_addr_read(uint64_t addr) "addr 0x%"PRIx64""
 pci_nvme_err_addr_write(uint64_t addr) "addr 0x%"PRIx64""
 pci_nvme_err_cfs(void) "controller fatal status"